I have struggled for hours tonight attempting to eliminate a fractional exponent in the denominator. For instance, one problem has y^5/3 in the denominator. I have the correct answer so I know I am doing it incorrectly (since I am obviously getting the wrong answer). I thought I could simply multiply both the numerator and denominator by either y^3/5 or y^5/3. Neither method is working.

I desperately need someone to tell me in a simple fashion how to get rid of the fractional exponent in the denominator. I am not asking for an answer to a problem, simply a method to remove the fractional exponent from the denominator. I would greatly appreciate an answer tonight as I have to turn this in tomorrow.